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Lubrication 2300-2600 engine An eccentric rotor type oiIpump. driven direct from the crankshaft. draws oil from the  sump through a strainer and delivers it to an external by-pass canister type filter.  Between the pump and filter, but incorporated in the pump body, is a pressure relief  valve. Excess oil from the valve drains back into the sump. Filtered oil passes into the  main oil gallery on the right-hand side of the engine. Passages in the crankcase direct oil  from the gallery to the four main bearings and through drilling’s in the crankshaft to the  connecting-rod journals. Oil finally escapes through a small drilling In the connecting-  rods directing a spray to the inside of the pistons, mainly for cooling purposes.   The main gallery also supplies oil through a passage in the cylinder block and cylinder  head to the camshaft, rocker shaft and the valve gear. A restrictor, however,  with a non-return valve is fitted into the vertical oil passage in the top face of  the cylinder block to reduce pressure to the camshaft carrier. The valve  prevents oil draining back down the gallery thereby maintaining a column of oil  when the engine is idle. Oil drains from the camshaft carrier back into the sump  through a passage at the front and rear of the engine.
This is the area the oil from the cylinder head enters the engine. The restrictor prevents oil draining back into the gallery and maintains a column of oil when the engine is idle.
Lubrication 2300-2600 engine An eccentric rotor type oiIpump. driven direct from the crankshaft. draws oil from  the sump through a strainer and delivers it to an external by-pass canister type  filter. Between the pump and filter, but incorporated in the pump body, is a  pressure relief valve. Excess oil from the valve drains back into the sump. Filtered  oil passes into the main oil gallery on the right-hand side of the engine. Passages in  the crankcase direct oil from the gallery to the four main bearings and through  drilling’s in the crankshaft to the connecting-rod journals. Oil finally escapes  through a small drilling In the connecting-rods directing a spray to the inside of the  pistons, mainly for cooling purposes. The main gallery also supplies oil through a passage in the cylinder block and  cylinder head to the camshaft, rocker shaft and the valve gear. A restrictor,  however, with a non-return valve is fitted into the vertical oil passage in the  top face of the cylinder block to reduce pressure to the camshaft carrier.  The valve prevents oil draining back down the gallery thereby maintaining a  column of oil when the engine is idle. Oil drains from the camshaft carrier  back into the sump through a passage at the front and rear of the engine.
This is the area the oil from the cylinder head enters the engine. The restrictor prevents oil draining back into the gallery and maintains a column of oil when the engine is idle.
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